Mobile Electronic Device with Dual Touch Displays and Multitasking Function, Control Method, and Storage Medium Storing Control Program

1. A mobile electronic device, comprising: a first display unit configured to display a first operation screen; a first operation detection unit configured to detect a touch operation on the first display unit; a second display unit configured to display a second operation screen; a second operation detection unit configured to detect a touch operation on the second display unit; and a control unit configured to perform a switching control to switch between a first state and a second state, wherein in the first state, the control unit is configured to deactivate a display of the second operation screen on the second display unit, and when a touch operation on the second display unit is detected by the second operation detection unit, to convert coordinates of a position of the touch operation on the second display unit into coordinates on the first operation screen and process the touch operation detected on the second display unit as an operation for the first operation screen, in the second state, the control unit is configured to deactivate a display of the first operation screen on the first display unit, and when a touch operation on the first display unit is detected by the first operation detection unit, to convert coordinates of a position of the touch operation on the first display unit into coordinates on the second operation screen and process the touch operation detected on the first display unit as an operation for the second operation screen, and the control unit is further configured to set a first detecting area in the first operation screen, for detecting a first operation, and a second detecting area in the second operation screen, for detecting a second operation corresponding to said first operation, wherein in the first state, the second detecting area is wider than the first detecting area, and in the second state, the first detecting area is wider than the second detecting area.

2. The mobile electronic device according to claim 1 , further comprising: a first housing including the first display unit and the first operation detection unit; a second housing including the second display unit and the second operation detection unit; and a connection unit configured to connect the first housing and the second housing, wherein the connection unit is configured to transform the first housing and the second housing between a first form in which a first display surface of the first display unit and a second display surface of the second display unit face toward substantially a same direction, and a second form in which the first display surface of the first display unit and the second display surface of the second display unit face away from each other in opposite directions.

3. The mobile electronic device according to claim 2 , wherein the control unit is configured to perform the switching control in a case where the first housing and the second housing are transformed to the second form, and to perform a control, in a case where the first housing and the second housing are transformed to the first form, so that a touch operation detected by the first operation detection unit is processed as an operation for the first operation screen and a touch operation detected by the second operation detection unit is processed as an operation for the second operation screen.

4. The mobile electronic device according to claim 2 , wherein the connection unit is further configured to transform the first housing and the second housing to a third form in which the first display surface of the first display unit and the second display surface of the second display unit face toward each other, and the control unit is configured to deactivate the display by the first display unit and the second display unit and deactivate a detection of touch operations by the first operation detection unit and the second operation detection unit when the first housing and the second housing are transformed to the third form.

5. The mobile electronic device according to claim 1 , wherein the control unit is configured to suspend an execution of a first program for displaying the second operation screen on the second display unit in the first state, and to resume the execution of the first program when the first state is switched to the second state.

6. The mobile electronic device according to claim 1 , further comprising an attitude detection unit configured to detect an attitude of the mobile electronic device, wherein the control unit is configured to switch the mobile electronic device to the first state when the attitude detection unit detects that the first display unit is directed to an upper direction, and to switch the mobile electronic device to the second state when the attitude detection unit detects that the second display unit is directed to the upper direction.

7. The mobile electronic device according to claim 1 , wherein the control unit is configured to switch the mobile electronic device to the first state when the second operation detection unit detects a touch operation, and to switch the mobile electronic device to the second state when the first operation detection unit detects a touch operation.

8. The mobile electronic device according claim 1 , further comprising an object detection unit configured to detect an object facing a surface of the first display unit, wherein the control unit is configured to switch the mobile electronic device to the first state when the object detection unit detects the object, and to switch the mobile electronic device to the second state when the object detection unit does not detect the object.

9. A control method executed by a mobile electronic device including a first display unit, a second display unit, a first operation detection unit and a second operation detection unit, the control method comprising: detecting a touch operation on the first display unit by the first operation detection unit; detecting a touch operation on the second display unit by the second operation detection unit; switching the mobile electronic device between a first state and a second state; in the first state, deactivating a display of a second operation screen on the second display unit, converting, when the touch operation on the second display unit is detected by the second operation detection unit, coordinates of a position of the touch operation on the second display unit into coordinates for a first operation screen displayed on the first display unit, and processing the touch operation detected by the second operation detection unit as an operation for the first operation screen displayed on the first display unit; in the second state, deactivating a display of the first operation screen on the first display unit, converting, when the touch operation on the first display unit is detected by the first operation detection unit, coordinates of a position of the touch operation on the first display unit into coordinates for the second operation screen displayed on the second display unit, and processing the touch operation detected by the first operation detection unit as an operation for the second operation screen displayed on the second display unit; setting a first detecting area in the first operation screen, for detecting a first operation; and setting a second detecting area in the second operation screen, for detecting a second operation corresponding to said first operation, wherein in the first state, the second detecting area is wider than the first detecting area, and in the second state, the first detecting area is wider than the second detecting area.

10. The control method according to claim 9 , further comprising: in the first state, deactivating the first operation detection unit; and in the second state, deactivating the second operation detection unit.

11. The control method according to claim 9 , wherein the mobile electronic device further includes: a first housing including the first display unit and the first operation detection unit; a second housing including the second display unit and the second operation detection unit; and a connection unit configured to connect the first housing and the second housing, wherein the connection unit is configured to transform the first housing and the second housing between a first form in which a first display surface of the first display unit and a second display surface of the second display unit face toward substantially a same direction, and a second form in which the first display surface of the first display unit and the second display surface of the second display unit face away from each other in opposite directions, and the control method further comprises in response to a first touch detected by the first or second operation detection unit after the first housing and the second housing are transformed to the second form, switching the mobile electronic device to the first state when the second operation detection unit detects the first touch, and switching the mobile electronic device to the second state when the first operation detection unit detects the first touch.

12. The control method according to claim 9 , further comprising: detecting an attitude of the mobile electronic device; and switching between (i) execution and (ii) suspension of execution of three or more programs in accordance with the detected attitude of the mobile electronic device.

13. A non-transitory storage medium that stores a control program for causing, when executed by a mobile electronic device including a first display unit, a second display unit, a first operation detection unit and a second operation detection unit, the mobile electronic device to execute: detecting a touch operation on the first display unit by the first operation detection unit; detecting a touch operation on the second display unit by the second operation detection unit; switching the mobile electronic device between a first state and a second state; in the first state, deactivating a display of a second operation screen on the second display unit, converting, when the touch operation on the second display unit is detected by the second operation detection unit, coordinates of a position of the touch operation on the second display unit into coordinates for a first operation screen displayed on the first display unit, and processing the touch operation detected by the second operation detection unit as an operation for the first operation screen displayed on the first display unit; in the second state, deactivating a display of the first operation screen on the first display unit, converting, when the touch operation on the first display unit is detected by the first operation detection unit, coordinates of a position of the touch operation on the first display unit into coordinates for the second operation screen displayed on the second display unit, and processing the touch operation detected by the first operation detection unit as an operation for the second operation screen displayed on the second display unit; setting a first detecting area in the first operation screen, for detecting a first operation; and setting a second detecting area in the second operation screen, for detecting a second operation corresponding to said first operation, wherein in the first state, the second detecting area is wider than the first detecting area, and in the second state, the first detecting area is wider than the second detecting area.

14. A mobile electronic device, comprising: a first display unit that includes a first display surface for displaying a first operation screen; a first operation detection unit configured to detect an operation on the first display unit; a second display unit that includes a second display surface for displaying a second operation screen; a second operation detection unit configured to detect an operation on the second display unit; and a control unit configured to perform a switching control to switch between a first state and a second state, wherein the first and second display units have an arrangement in which the second display surface substantially overlaps the first display surface in a direction opposite to the first display surface, and in said arrangement, the control unit is configured in the first state, to deactivate a display of the second operation screen on the second display unit, to deactivate the first operation detection unit, and when the operation on the second display unit is detected by the second operation detection unit at a first position, to convert coordinates of the first position into coordinates on the first operation screen and process the operation detected on the second display unit as an operation for an item displayed on the first operation screen at a position behind and corresponding to the first position, and in the second state, to deactivate a display of the first operation screen on the first display unit, to deactivate the second operation detection unit, and when the operation on the first display unit is detected by the first operation detection unit at a second position, to convert coordinates of the second position into coordinates on the second operation screen and process the operation detected on the first display unit as an operation for an item displayed on the second operation screen at a position behind and corresponding to the second position.